Indicator



Jan. 30 B G WARDENBURG INDICATOR Filed Oct. 20, 1932 j' INVENTOR BERNHARD c. WARDENBURG BY HIS ATTORNEYS MMM Patented Jan. 30, 1934 UNITED STATES PATENT ori ce 1,945,456 nmca'ron Bernhard Wardenburg, Toledo, Ohio, assignor to Moto Meter Gauge & Equipment Corporation, Toledo, Ohio, a corporation of Delaware Application October 20, 1932. Serial No. 638,817

11 Claims.

This invention relates to indicators, and more particularly to devices of this character having a maximum hand and means for resetting the maximum hand.

The main object of the invention is to permit resetting of the maximum hand while preventing entrance of moisture or other undesirable substances into the casing of the indicator.

Other objects and features of novelty will be apparent from the following description and the accompanying drawing, in whichpart of Figure 1, showing a modification of the invention.

The indicator comprises a casing 4 in which is mounted mechanism responsive to the. condition to be indicated. For example, this mechanism is temperature responsive, the mechanism including a Bourdon tube 5 which is connected by a capillary tube 6 to a point the temperature of which is to be indicated. This mechanism actuates a hand '7 which is pivoted as at 8 to swing over a dial 9 mounted in the casing in front of the Bourdon tube 5.

Mounted in front of the pivot 8 is a bracket or bridge piece 10, suitably secured inside the casing, as by screws 11 entering lugs 12. A maximum hand 13 is pivoted on the bracket 10 as at 14 in substantial alignment with the pivot 8. A spring washer l5 maintains a light frictional contact tending to hold the hand 13 in whatever position in which it may be.

The hand 7 is provided with an abutment 16 which, when the hand '7 is moved toward the maximum end of the dial, engages the hand 13 and moves it therewith, against the friction of the washer 14. When the hand '7 recedes, the washer 14 holds the hand 13 in the position of the maximum reading of hand 7.

An actuator 17 is adapted to engage the hand 13, and is actuated by means operable from outside the casing for resetting the same. This ac tuator is preferably pivoted on the bracket 10 as at 18 and comprises a cam portion 19 and an arm portion l9a passing between the pivots 8 and 14, and bent laterally as at 20 to engage the hand 13.

The cam portion 19 is engaged by a leaf spring 21, the end of which is secured inside the casing as at 22. A push button 23 secured to the spring 21 passes-through an aperture 24 in the casing,

but is normally covered by a screw plug 25 threaded in this aperture, and having a socket 26 housing the push button. A gasket 27 under the plug 25 maintains the casing fluid tight.

The mechanism below the dial 9 is preferably concealed by a cover plate 30 which is secured to the bracket 10. A transparent cover such as a glass plate 31 is mounted in a screw bezel 32 which provides a fluid tight joint.

In the form shown in Fig. 3, the actuator is modified to provide in lieu of the cam portion, a pair of ears 33 and 34' which are bent laterally to receive the leaf spring between them.

The spring in this form positively actuates the actuator in both directions.

The invention is not limited to the details disclosed, but instead includes such embodiments as fall within the scope of the appended claims.

I claim:

1. In an indicator having a casing, a maximum hand in said casing, means connected to said casing, and movable into engagement with said maximum hand for resetting the same, and means actuated from outside said casing for operating said resetting means.

2. In an indicator having a casing, a bracket in said casing, a maximum hand and a means for resetting the same both pivoted on said bracket, and means for actuating said resetting means.

3. In an indicator, an instantaneous hand mounted on a pivot, a maximum hand having a pivot separate from the pivot of said instantaneous hand, and resetting means comprising a member movable between said pivots and engageable with said maximum hand.

4. In an indicator, an instantaneous hand, a maximum hand, and resetting mechanism comprising a pivoted cam having an abutment adapted to engage said maximum hand.

. 5. In an indicator having a casing with a dial therein and an instantaneous hand cooperating therewith, mechanism in back of said dial for actuating said hand, a bracket mounted in the casing in front of said mechanism, a maximum hand pivoted on said bracket, and means for resetting said maximum hand.

6. In an indicator, a maximum hand, a reset actuator therefor, and means for positively moving said reset actuator in both directions.

'7. In an indicator, a casing, a maximum hand, a reset actuator having two abutments thereon, and means operable from outside said casing and extending between said abutments for resetting said maximum hand.

, operating said spring.

10. In an indicator, a casing having an aperture and a closure therefor, a bracket in said casing, a maximum hand pivoted on said bracket, a reset actuator pivoted on said bracket, a spring tongue having one end fixed in said casing and the other end engaging said actuator, and means extending through said aperture for moving said spring to cause said actuator to reset said hand.

11. In an indicator, a casing having a dial, an instananeous hand pivoted inside said casing, means for moving said instantaneous hand about its pivot and over said dial in response to variations in the condition to be indicated, a maximum hand pivoted inside said casing for movement about its pivot in a plane parallel to the plane of movement of said instantaneous hand, means for causing said maximum hand to move with said instantaneous hand toward the maximum end of said dial, and means operable from outside said casing for positively engaging said maximum hand and moving it in the opposite direction to reset the same. 1

BERNHARD G. WARDENBURG. 

